 Out of the king's vill, as a rule the jurisdictional centre of a hundred, there was sometimes created a borough.The lines of division before Domesday Book are obscure, but it is probable that in some cases, by a royal grant of jurisdiction, the inhabitants of a populous royal vill, where a hundred court for the district was already held, were authorised to establish a permanent court, for the settlement of their disputes, distinct from the hundred court of the district.Boroughs of this type with a uniform tenure were created not only on the king's estates but also on those of his tenants-in-chief, and in 1086 they were probably already numerous.